(Wits) The Spider's Trap Door (Wits 4 Ess 2 p190): 4m, Supplemental, Combo-OK, Illusion: Supplements an action to conceal something. The concealed object becomes undetectable by any Awareness rolls using mortal senses. If you commit the essence, any person who comes near suffers an unnatural mental attack with a number of successes equal to those rolled for concealment plus the Lunar’s Essence. Those whose Mental Defense Values are less than this value see the area as completely undisturbed and empty, even if they look exactly where the object rests.